Wow i didnt think il see a metroidvania here, It was really fun! the animation was great and you managed to fit alot into it! but heres some things that maybe could be improved:
1. most of the background was red, and some of the enemy attacks were the same color, so it was hard to see.
2.Theres lava pits that when you fall in you cant jump out (im talking before the double jump) so you just have to wait until you are dead which isnt all that fun.
but overall it was really fun, good job!